RIVERHEAD - Two medical professionals are accused of contributing to Long Island's prescription pill epidemic. During a yearlong investigation, authorities say they found staff members at a Deer Park medical office were handing out illegal painkiller prescriptions, specifically oxycodone. Suffolk Assistant District Attorney Dina Cangero told a Riverhead courtroom that the office was no more than a pill mill. She said Wesley Harris, a registered sex offender, was the gatekeeper of the operation and kept a loaded revolver in the office. Authorities say nurse practitioner Ingrid Gordon Patterson was also a part of the drug operation. Gordon Patterson's defense attorney Barry Zone denied the charges and placed blame on the patients. Prosecutors say several other defendants have been arraigned, and more arrests are expected.